Well I've a point to make. Is our psychology driven more by genetics or environment?
That depends on the specific memes. Some memes are made more likely to persist by factors of our physical wiring, our genetics... but other memes are likely to persist only within their environmental contexts.
This is a really loaded question that, without specific contexts, has several real and plausible answers.
Good response. I would tend to agree, but if I have to go black and white with the poll, my split would be that external factors ultimately weigh in more, in general.